Cut along the corners where the wall meets other walls and the ceiling, using a razor. This will prevent the drywall from tearing.

Remove or cover any furniture in the two rooms. Seal off the rooms with plastic sheeting so dust doesn't fill your house.

Pry moldings, trim and doorjambs away from the wall.

Hammer a hole in the wall while wearing a mask.

Pull off drywall with a claw hammer or crowbar.

Reroute any electricity or plumbing inside the wall. You may need to consult with an expert for this step.

Remove any wall studs by knocking them loose with a hammer and then twisting them off. Alternatively, you can saw through them and twist out the two halves. You may be able to saw through all of the studs and then push over the whole wall at once [source: Acme DIY, Champley].